diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-03-06 05:00:12 +0100 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-03-06 05:24:47 +0100 |
| commit | 7f54ab5ff52fb0b91569bc69c4a6bc5cac1b768d (patch) | |
| tree | 6d6406de2bb6f3ab3cd67413e4e2329707f29099 /drivers | |
| parent | Linux 4.5-rc5 (diff) | |
| download | linux-7f54ab5ff52fb0b91569bc69c4a6bc5cac1b768d.tar.xz linux-7f54ab5ff52fb0b91569bc69c4a6bc5cac1b768d.zip | |
target: Drop incorrect ABORT_TASK put for completed commands
This patch fixes a recent ABORT_TASK regression associated
with commit febe562c, where a left-over target_put_sess_cmd()
would still be called when __target_check_io_state() detected
a command has already been completed, and explicit ABORT must
be avoided.
Note commit febe562c dropped the local kref_get_unless_zero()
check in core_tmr_abort_task(), but did not drop this extra
corresponding target_put_sess_cmd() in the failure path.
So go ahead and drop this now bogus target_put_sess_cmd(),
and avoid this potential use-after-free.
Reported-by: Dan Lane <dracodan@gmail.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/target/target_core_tmr.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c index 82a663ba9800..4f229e711e1c 100644 --- a/drivers/target/target_core_tmr.c +++ b/drivers/target/target_core_tmr.c @@ -177,7 +177,6 @@ void core_tmr_abort_task( if (!__target_check_io_state(se_cmd, se_sess, 0)) { spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); - target_put_sess_cmd(se_cmd); goto out; } list_del_init(&se_cmd->se_cmd_list); |